3.4.22.33	additional information	scarcely inhibited by chicken chystatin	2	
3.4.22.33	additional information	enzyme is inhibited by cystatin	2	
3.4.22.33	additional information	not inhibited by pepstatin	2	
3.4.22.33	additional information	no effect on activity by EDTA	2	
3.4.22.33	additional information	stability of bromelain in the presence of EDTA and sodium benzoate; stability of bromelain in the presence of EDTA and sodium benzoate	2	
3.4.22.33	Ca2+	noncompetitive inhibition at pH 3.5, while both K-and V-type activations of bromelain are observed in the presence of 0.5 mM Ca2+ at pH 4.5 and pH 7.5	15	
3.4.22.33	Cu2+	12% residual activity at 0.16 mM	19	
3.4.22.33	Cu2+	inhibits casein degradation, complete inhibition	19	
3.4.22.33	Cu2+	reduces activity	19	
3.4.22.33	Cu2+	competitive inhibition at pH 3.5 with 0.6 mM Cu2+, which changes to an uncompetitive inhibition at pH 4.5 and pH 7.5	19